Most drivers could easily identify these duct-tape wrapped shapes as the universal sign for “Caution: Crazy Person Ahead,” but our submitter in Boston actually pulled over and parked in order to get a better look. Up close, “the signs were even crazier than we thought,” she reports. “Seriously, what happened to this guy?”

Writes an anonymous submitter in Houston: “A neighbor in my building put up an Obama yard sign on the door of her apartment around the time of the Texas primary. When it disappeared, I assumed she took it down herself.”

Then up went this note — a cheerful bit of propaganda that oh-so-subtly disproves all those ugly stereotypes about “self-righteous Obama supporters” with a colorful blaze of moralistic tsk-tsking and First-Amendment flag-waving. (Woo! Obama ’08!)

Dealing with the rantings of your crazy boss or overzealous receptionist is one thing, but what do you do when your office’s resident passive-aggressive note-leaver doesn’t even work there? Casey in San Diego (a.k.a. RunBarbara) says that’s the situation she’s found herself in at her job.

The offender, Sandra, “has met me a total of twice, both times for less than a minute,” Casey says. Yet for some reason, when Sandra (the aunt of the owner) stops by the office once a week to water the plants and drop off supplies, “she leaves these strange notes EVERYWHERE — and she almost always directs questions about said notes to me,” Casey says. “I often have no idea she posts these notes until someone asks me about the odd directions in them.”

Below, a small sampling of Sandra’s delightfully bizarrre directives. (Just click on the photos to enlarge.)

I’d like to think this note was posted immediately following the “potluck”…

Writes Bibs in Tacoma, Washington: “My sophomore year in college, I was placed in a campus house with six other girls I didn’t know. To say the least, we did not really get along, but we made a chore chart so we would all at least have a semi-clean house to live in.” At least, that was the idea.

Things broke down when one of the housemates, Cindy, was confronted with the reality of seven girls sharing one bathroom. After this little display, Bibs says, the chore wheel pretty much went to hell.

J.Star says he found this passive-aggressive twist on the old RSPCA campaign/Scottish band in a Cincinnati parking lot. (Pet-lovers: just to let you know, it was crumpled up on the ground, not on his windshield.)

“It seems too many people have made love to the office water cooler,” says Lizzy in New York. And some of them, it seems, are getting a little sloppy.

Lizzy says the “Office of Water” thing refers to the fact that “Our office is full of water. Like, the fridge doesn’t have anything but bottled water and Coke,” but I’m not quite buying it. I’d like to think this came from the EPA’s official Office of Water (Benjamin H. Grumbles, assistant administrator).